JPH04271738A - Fishing tip rod and its production - Google Patents

Abstract

PURPOSE:To provide a fishing tip rod without lowering the elastic modulus and interlaminar shear force thereof by impregnating a specific fiber cloth with a resin, winding the formed prepreg on a mandrel and subsequently thermally curing the wound prepreg. CONSTITUTION:A fiber cloth is impregnated with a resin 3 to form a prepreg P. The fiber cloth comprises warps 1 arranged in (approximately) parallel to the axis X of the tip rod in a single filament number of <=1000 and wefts 2 arranged in (approximately) parallel to the peripheral direction of the rod R in a low density. The prepreg P is wound on a mandrel 4 to form a layer of approximately one-three plies, followed by thermally curing the wound prepreg to provide the tip rod in which the prepreg had been readily wound without causing a spring back.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip rod and a method for manufacturing the same, and more particularly to a technique for improving a tip rod formed into a cylindrical shape.

0002

[Prior Art] Considering the tip of a carbon rod that is formed into a cylindrical shape, this kind of tip that is formed into a cylindrical shape is made of carbon fibers with a single fiber count of about 3,000 to 6,000 and epoxy resin. It is usually manufactured by winding prepreg impregnated with resin etc. around a mandrel and then hardening it by firing. Conventionally, during this manufacturing process,
In order to suppress springback and wind the prepreg easily even on relatively small-diameter mandrels, we use a stretched-type prepreg (lined with ultra-thin glass cloth) with the fiber direction set in the direction of the axis of the rod. (normally) is used. Incidentally, the unit of the number of single fibers constituting the fibers is usually called a filler, and the diameter of the single fibers is generally set to 6 to 8 micrometers.

0003

[Problem to be solved by the invention] However, in this way,
In the case where a stretched type prepreg is used in which the fiber direction is set in the direction of the axis of the rod, the restraining force against lateral deformation of the prepreg itself is small. The fibers may not follow the core and become meandering, resulting in areas with uneven strength. Also, the gaps between the fibers are small and it is difficult to impregnate the resin, resulting in poor elastic modulus and interlaminar shear after firing. There is room for improvement as the power is often reduced. Although these inconveniences can be somewhat alleviated by using a cross-shaped prepreg made by weaving fibers with the same number of fillers (number of single fibers) vertically and horizontally, the above-mentioned springback will not be suppressed, and this type of It is difficult to realize the use of prepreg. The purpose of the present invention is to suppress springback and wind the prepreg easily, without compromising the good aspects, such that the fibers are aligned with the axis of the mandrel when wound around the mandrel, and the fibers are aligned with the axis of the mandrel after firing. The object of the present invention is to rationally configure a tip rod that does not reduce elastic modulus and interlaminar shear force, and a method for manufacturing the same.

0004

[Means for Solving the Problems] The present invention is characterized in that the number of single fibers is set to 1000 or less in the vertical fibers arranged in parallel or substantially parallel to the axis of the rod, With respect to the density of this vertical fiber, in the circumferential direction of the rod,
The point where the tip of the rod is formed by forming a resin-impregnated fiber cloth with a low density of horizontal fibers arranged parallel or approximately parallel into a cylindrical shape, and the point where the tip is parallel to the axis of the rod. , or, the number of single fibers is set to 1000 or less, and the vertical fibers are arranged in a substantially parallel orientation, and the density of the vertical fibers is parallel or approximately parallel to the circumferential direction of the rod. A prepreg is formed by impregnating a fiber cloth with a low density of horizontal fibers arranged in a posture to form a prepreg, and this prepreg is wound around a mandrel and fired to form a cylindrical shape to produce a tip rod. The functions and effects are as follows.

[0005]

[Operation] When the above characteristics are configured as shown in FIGS. 1 to 3, for example, when winding the prepreg around the mandrel during manufacturing, the prepreg is compared with a cross-shaped prepreg made by weaving fibers with the same number of fillers in the vertical and horizontal directions. As a result, springback is suppressed, and furthermore, in the invention, the number of fillers in the weft fibers is necessarily less than 1000, so
The springback value can also be reduced compared to the conventional method, and during this winding, the horizontal fibers 2 suppress the disturbance of the vertical fibers 1 in the circumferential direction of the mandrel 4. Since the horizontal fiber 2 will be inserted in between,
Impregnation of the resin 3 is promoted through the gap through which the horizontal fibers 2 are inserted. Furthermore, after firing, the vertical fibers 1 are maintained in a uniform posture along the axis X direction of the rod R, and the resin 3 is placed between the vertical fibers 1.
Since it is cured in a sufficiently filled state, the strength of the longitudinal fibers 1 can be fully demonstrated by bonding the longitudinal fibers 1, 1 with resin 3. The resin 3 and the horizontal fibers 2 suppress the displacement in the shearing direction. In other words, in the present invention, unlike the case in which the vertical fibers 1 and the horizontal fibers 2 are simply overlapped, a cloth woven from each fiber is used, so that the horizontal fibers 2 not only suppress the disorder of the vertical fibers 1, but also Since the intersecting fibers form gaps, the strength in the shear direction can be improved and resin impregnation can be promoted as described above.

[0006]

[Effects of the Invention] Therefore, without impairing the good aspect of suppressing springback and winding the prepreg without strain, the fibers are aligned with the axis of the mandrel during winding on the mandrel, and after firing A tip rod that does not significantly reduce the elastic modulus and interlaminar shear force, and a method for manufacturing the same have been rationally constructed.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. 1 to 3 show a method for manufacturing a tip rod according to the present invention. In this method, first, carbon fiber yarn having a relatively small number of single fibers from 10 fillers to 1000 fillers is used to form longitudinal fibers. 1 and horizontal fibers 2, and after molding, the density of the horizontal fibers 2 in a posture along the circumferential direction of the rod R is lower than the density of the vertical fibers 1 in a posture along the axis X direction of the rod R. As shown in Figure 1, the vertical fiber 1
The distance D1 between the horizontal fibers 2 and the distance D2 between the horizontal fibers 2 is 1:3.
The prepreg P is formed by impregnating the resin 3 into a fiber cloth whose relative relationships are set to the same degree. Incidentally, the diameter of the single fiber used for this fiber is set to 6 to 8 micrometers. Next, this prepreg P is placed on a mandrel 4 having a tip diameter of approximately 0.5 mm.
After winding approximately three plies, the resin is fired to harden and formed into a cylindrical shape. What is formed by firing in this way is the tip rod R according to the present invention.
By manufacturing in this way, the vertical fibers 1 are maintained in an aligned position without being disturbed along the axial direction of the rod, and the resin 3 is sufficiently distributed between the vertical fibers 1. Since it is cured in a state where the longitudinal fibers 1, 1 are bonded together with the resin 3, the strength of these longitudinal fibers can be fully demonstrated, and the strength of the longitudinal fibers 1, 1 in the shear direction between them can be fully demonstrated. The displacement is suppressed by the resin 3 and the horizontal fibers 2.

[Other Embodiments] In addition to the above embodiments, the present invention includes
For example, as shown in FIGS. 4 and 5, the tip rod R is prepared by preparing two prepregs P formed as described above, and after winding one ply of this prepreg P around the mandrel 4, the fibers are By winding one ply of aligned carbon fiber prepreg Q with the direction set to the rod axis X direction, and further winding one ply of the prepreg P described above,
It is also possible to form three fiber layers as shown in FIG. In addition, each layer is designated P, Q according to the prepreg number.
, P. Although the three layers P, Q, and P are shown as being independent in FIG. 5, after firing, the respective resins are fused to each other and integrated. Furthermore, in the present invention, as shown in FIG. 6, the vertical fibers 1 and the horizontal fibers 2 are set at approximately equal intervals, and the number of fillers in the horizontal fibers 2 is set to be smaller than the number of fillers in the vertical fibers 1.
The means for setting the density of the weft fibers 2 to be lower than the density of the warp fibers 1 can be constructed in various ways, such as by forming.

Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

[Figure 1] Enlarged view of prepreg

[Figure 2] Diagram showing mandrel and prepreg

[Figure 3] Cross-sectional view of the tip rod

[Figure 4] Diagram showing a mandrel and prepreg in another embodiment

[Fig. 5] Cross-sectional view of a tip rod in another embodiment

FIG. 6 is a diagram showing the morphology of fibers in another example.

[Explanation of symbols]

1. Vertical fiber 2　Weft fiber 4 Mandrel P prepreg X axis center

Claims (2)

[Claims] Claim 1: The vertical fibers (1) are arranged parallel or substantially parallel to the axis (X) of the rod, and the number of single fibers is set to 1000 or less, and the vertical fibers (
Molding resin-impregnated fiber cloth into a cylindrical shape in which the density of the horizontal fibers (2), which are arranged parallel or approximately parallel to the circumferential direction of the rod, is set to be lower than the density of 1). The tip of the rod is made of. 2. The vertical fibers (1) are arranged parallel or substantially parallel to the axis (X) of the rod, and the number of single fibers is set to 1000 or less, and the vertical fibers (
Prepreg (P ), and this prepreg (P) is passed through a mandrel (
4) A method for producing a tip rod, which is wound around the tube, fired, and formed into a cylindrical shape.